最优应力波形下的冲击机械冲锤部件的反演设计及参数优化

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (7) : 102-109.

论文

赵翼飞，白争锋，杨斌久

作者信息 +

Impactor’s inverse design and parameters optimization of impact machinery based on the optimal stress waveform

Zhao Yifei，Bai Zhengfeng，Yang Binjiu

Author information +

文章历史 +

摘要

受空间环境下月壤采样机构能源供给的限制，本文立足于一般的冲击机械模型，假定岩土动态加载刚度一定的情况下分析比较了不同形式入射波形对岩土介质作功过程中能量传递效率情况；以实现最优指数应力波形为目标，基于一维波动力学理论及δ(t)函数法对冲锤部件的波阻抗进行反演设计，并使用正解计算和有限元仿真的方法验证反演设计的正确性；运用假设脱离法分析了冲锤与击杆之间的受力及运动状态，分析了冲锤几何外形无量纲参数影响下能量传递效率和冲锤冲击效率的变化规律并计算相关的最优参数。

Abstract

Because of the limit energy supplied on the soil sampling machinery the energy transfer efficiency was analyzed and compared under different waveform and constant rock-soil’s dynamic stiffness based on the general impact machinery model. The impactor’s impedance was designed inversely based on one-dimensional wave mechanics and Dirac delta function δ(t) in order to achieve the optimal waveform and it was proved correctly by forward solution and FEM; the state of motion and stress between the impactor and rod was analyzed by separation first hypothesis between them. The energy transfer efficiency and impactor’s impaction efficiency influenced by impactor’s geometry dimensionless parameters were analyzed and the optimal parameters were also determined.

导出引用

赵翼飞，白争锋，杨斌久. 最优应力波形下的冲击机械冲锤部件的反演设计及参数优化[J]. 振动与冲击, 2016, 35(7): 102-109

Zhao Yifei，Bai Zhengfeng，Yang Binjiu. Impactor’s inverse design and parameters optimization of impact machinery based on the optimal stress waveform[J]. Journal of Vibration and Shock, 2016, 35(7): 102-109

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